Ironwood Pharmaceuticals Reports First Quarter 2025 Results

– On track to achieve FY 2025 financial guidance; raised adjusted EBITDA guidance to greater than $105 million for 2025 –

– LINZESS® (linaclotide) EUTRx prescription demand growth of 8% year-over-year; in line with full-year expectations –

– Exploring strategic alternatives to maximize stockholder value –

BOSTON–(BUSINESS WIRE)–Ironwood Pharmaceuticals, Inc. (Nasdaq: IRWD), a biotechnology company developing and commercializing life-changing therapies for people living with gastrointestinal (GI) and rare diseases, today reported its first quarter 2025 results and recent business performance.

“LINZESS demand continues to be strong, and we remain on track to meet our full-year 2025 guidance and further, recently raised our adjusted EBITDA guidance. We are making a concerted effort to maximize stockholder value across all areas of the business, including advancing plans for a confirmatory Phase 3 trial for apraglutide and exploring strategic alternatives,” said Tom McCourt, chief executive officer of Ironwood.

First Quarter 2025 Financial Highlights¹

(in thousands, except for per share amounts)

Recent 2025 Corporate Highlights

Apraglutide

• In April 2025, Ironwood announced based on a recent discussion with the U.S. Food and Drug Administration (FDA) that a confirmatory Phase 3 trial will be needed to seek approval of apraglutide for patients with short bowel syndrome (SBS) with intestinal failure (IF) who are dependent on parenteral support. Consistent with FDA discussions, Ironwood plans to continue the long-term extension trial and work with the FDA on the design of a confirmatory Phase 3 trial and the regulatory path forward.
• Apraglutide generated strong safety and efficacy data in the STARS Phase 3 trial, the largest SBS-IF trial to date, and following an analysis of long-term extension trial data, 27 apraglutide-dosed patients dependent on parenteral support achieved enteral autonomy, which is the ultimate goal for these patients. Ironwood believes the data from the STARS and STARS Extend trials will continue to be an integral part of an NDA submission package.

U.S. LINZESS

• Prescription Demand: Total LINZESS prescription demand in the first quarter of 2025 was 53 million LINZESS capsules, an 8% increase compared to the first quarter of 2024, per IQVIA.
• U.S. Brand Collaboration: LINZESS U.S. net sales are provided to Ironwood by its U.S. partner, AbbVie Inc. (“AbbVie”). LINZESS U.S. net sales were $138.5 million in the first quarter of 2025, a 46% decrease compared to $256.6 million in the first quarter of 2024. Ironwood and AbbVie share equally in U.S. brand collaboration profits.
  • Q1 2025 LINZESS U.S. net sales reflects a change in AbbVie’s estimate of gross-to-net rebate reserves, which is expected to impact the quarterly phasing of LINZESS U.S. net sales but not the full-year results. This change in estimate is based on expected rebates owed for units dispensed by channel in each quarter, which negatively impacted Q1 2025 net sales. Moving forward, gross-to-net rebate reserves will continue to be based on rebates owed for units dispensed by channel in each applicable quarter. Based on historical trends, Ironwood expects rebates owed for units dispensed in subsequent quarters to offset the Q1 2025 change in estimate impact and expects no impact for the full year.
  • As a reminder, based on information provided by AbbVie, in Q1 2024, Ironwood recorded a $30 million reduction to collaborative arrangements revenue in its first quarter 2024 financial statements because of a LINZESS gross-to-net change in estimate related to the year ended December 31, 2023.

– LINZESS commercial margin was 52% in the first quarter of 2025, compared to 71% in the first quarter of 2024. See the U.S. LINZESS Full Brand Collaboration table at the end of this press release.

– Net profit for the LINZESS U.S. brand collaboration, net of commercial and research and development (“R&D”) expenses, was $65.9 million in the first quarter of 2025, a 62% decrease compared to $175.6 million in the first quarter of 2024. See the U.S. LINZESS Full Brand Collaboration table at the end of this press release.

• Collaboration Revenue to Ironwood: Ironwood recorded $38.8 million in collaboration revenue in the first quarter of 2025 related to sales of LINZESS in the U.S., a 46% decrease compared to $71.7 million for the first quarter of 2024. See the U.S. LINZESS Commercial Collaboration table at the end of the press release.

Corporate Updates

• In April 2025, Ironwood announced that Goldman Sachs & Co. LLC has been engaged to explore strategic alternatives for the company.

First Quarter 2025 Financial Results

• Total Revenue. Total revenue in the first quarter of 2025 was $41.1 million, compared to $74.9 million in the first quarter of 2024.
  
  – Total revenue in the first quarter of 2025 consisted of $38.8 million associated with Ironwood’s share of the net profits from the sales of LINZESS in the U.S., and $2.3 million in royalties and other revenue. Total revenue in the first quarter of 2024 consisted of $71.7 million associated with Ironwood’s share of the net profits from the sales of LINZESS in the U.S., including the $30.0 million reduction and $3.2 million in royalties and other revenue.
  
  – The year-over-year decrease in total revenue reflects a change in AbbVie’s gross-to-net rebate reserves in the first quarter of 2025, which is expected to impact the quarterly phasing of LINZESS U.S. net sales in 2025 but is not expected to impact the full-year results. See U.S. Brand Collaboration section of this press release above for further explanation.
• Total Costs and Expenses. Total costs and expenses in the first quarter of 2025 were $70.3 million, compared to $63.9 million in the first quarter of 2024.
  
  – Total costs and expenses in the first quarter of 2025 consisted of $24.3 million in selling, general and administrative (“SG&A”) expenses, $27.4 million in R&D expenses and $18.6 million in restructuring expenses. Total costs and expenses in the first quarter of 2024 consisted of $37.6 million in SG&A expenses, $25.8 million in R&D expenses, and $0.4 million in restructuring expenses.
• Interest Expense. Interest expense was $8.1 million in the first quarter of 2025, in connection with Ironwood’s convertible senior notes and revolving credit facility. Interest expense was $7.2 million in the first quarter of 2024, in connection with Ironwood’s convertible senior notes and revolving credit facility.
• Interest and Investment Income. Interest and investment income was $0.9 million in the first quarter of 2025. Interest and investment income was $1.2 million in the first quarter of 2024.
• Other. Other income was insignificant in the first quarter of 2025 driven by a gain recorded for pension-related activities.
• Income Tax Expense. Ironwood recorded $1.1 million of income tax expense in the first quarter of 2025, the majority of which was non-cash, as Ironwood continues to utilize net operating losses to offset taxable income for federal purposes and in many states. Ironwood recorded $9.1 million of income tax expense in the first quarter of 2024, the majority of which was non-cash, as Ironwood continued to utilize net operating losses to offset taxable income for federal purposes and in many states.
• GAAP Net Loss. GAAP net loss was $37.4 million, or ($0.23) per share (basic and diluted) in the first quarter of 2025, compared to GAAP net loss of $4.2 million, or ($0.03) per share (basic and diluted) in the first quarter of 2024.
• Non-GAAP Net Loss. Non-GAAP net loss was $23.2 million, or ($0.14) per share (basic and diluted), in the first quarter of 2025, compared to non-GAAP net loss of $2.9 million, or ($0.02) per share (basic and diluted), in the first quarter of 2024.
  
  – Non-GAAP net loss excludes the impact of amortization of acquired intangible assets, restructuring expenses and acquisition-related costs, all net of tax effect. See Non-GAAP Financial Measures below.
• Adjusted EBITDA. Adjusted EBITDA was ($4.7) million in the first quarter of 2025, compared to $21.1 million in the first quarter of 2024.
  
  – Adjusted EBITDA is calculated by subtracting stock-based compensation, restructuring expenses, net interest expense, income taxes, depreciation and amortization, and acquisition-related costs, from GAAP net loss. See Non-GAAP Financial Measures below.
• Cash Flow Highlights. Ironwood ended the first quarter of 2025 with $108.5 million of cash and cash equivalents, compared to $88.6 million of cash and cash equivalents at the end of 2024.
  
  – Ironwood generated $20.0 million in cash from operations in the first quarter of 2025, compared to $45.0 million in cash from operations in the first quarter of 2024.
• Ironwood 2025 Financial Guidance. Ironwood continues to expect:

Non-GAAP Financial Measures

Ironwood presents non-GAAP net income (loss) and non-GAAP net income (loss) per share to exclude amortization of acquired intangible assets, restructuring expenses, and acquisition-related costs, all net of tax effect. Non-GAAP adjustments are further detailed below:

• Amortization of acquired intangible assets are non-cash expenses arising in connection with the acquisition of VectivBio and are considered to be non-recurring.
• Restructuring expenses are considered to be a non-recurring event as they are associated with distinct operational decisions. Restructuring expenses include costs associated with exit and disposal activities.
• Acquisition-related costs in connection with the acquisition of VectivBio are considered to be non-recurring and include direct and incremental costs associated with the acquisition and integration of VectivBio to the extent such costs were not classified as capitalizable transaction costs attributed to the cost of net assets acquired through acquisition accounting.

Ironwood also presents adjusted EBITDA, a non-GAAP measure, as well as guidance on adjusted EBITDA. Adjusted EBITDA is calculated by subtracting stock-based compensation, restructuring expenses, net interest expense, income taxes, depreciation and amortization, and acquisition-related costs from GAAP net income. The adjustments are made on a similar basis as described above related to non-GAAP net income (loss), as applicable.

Management believes this non-GAAP information is useful for investors, taken in conjunction with Ironwood’s GAAP financial statements, because it provides greater transparency and period-over-period comparability with respect to Ironwood’s operating performance. These measures are also used by management to assess the performance of the business. Investors should consider these non-GAAP measures only as a supplement to, not as a substitute for or as superior to, measures of financial performance prepared in accordance with GAAP. In addition, these non-GAAP financial measures are unlikely to be comparable with non-GAAP information provided by other companies. For a reconciliation of non-GAAP net income (loss) and non-GAAP net income (loss) per share to GAAP net income and GAAP net income per share, respectively, and for a reconciliation of adjusted EBITDA to GAAP net income, please refer to the tables at the end of this press release.

Ironwood does not provide guidance on GAAP net income or a reconciliation of expected adjusted EBITDA to expected GAAP net income because, without unreasonable efforts, it is unable to predict with reasonable certainty the non-GAAP adjustments used to calculate adjusted EBITDA. These adjustments are uncertain, depend on various factors and could have a material impact on GAAP net income for the guidance period.

About Ironwood Pharmaceuticals

Ironwood Pharmaceuticals (Nasdaq: IRWD) is a biotechnology company developing and commercializing life-changing therapies for people living with gastrointestinal (GI) and rare diseases. Ironwood is advancing apraglutide, a next-generation, long-acting synthetic GLP-2 analog being developed for short bowel syndrome patients who are dependent on parenteral support. In addition, Ironwood has been a pioneer in the development of LINZESS® (linaclotide), the U.S. branded prescription market leader for adults with irritable bowel syndrome with constipation (IBS-C) or chronic idiopathic constipation (CIC). LINZESS is also approved for the treatment of functional constipation in pediatric patients ages 6-17 years old. Building upon our history of innovation, we keep patients at the heart of our R&D and commercialization efforts to reduce the burden of diseases and address significant unmet needs.

Founded in 1998, Ironwood Pharmaceuticals is headquartered in Boston, Massachusetts, with a site in Basel, Switzerland.

We routinely post information that may be important to investors on our website at www.ironwoodpharma.com. In addition, follow us on X and on LinkedIn.

About LINZESS (Linaclotide)

LINZESS® is the #1 prescribed brand in the U.S. for the treatment of adult patients with irritable bowel syndrome with constipation (“IBS-C”) or chronic idiopathic constipation (“CIC”), based on IQVIA data.

LINZESS is a once-daily capsule that helps relieve the abdominal pain, constipation, and overall abdominal symptoms of bloating, discomfort and pain associated with IBS-C, as well as the constipation, infrequent stools, hard stools, straining, and incomplete evacuation associated with CIC. LINZESS relieves constipation in children and adolescents aged 6 to 17 years with functional constipation. The recommended dose is 290 mcg for IBS-C patients and 145 mcg for CIC patients, with a 72 mcg dose approved for use in CIC depending on individual patient presentation or tolerability. In children with functional constipation aged 6 to 17 years, the recommended dose is 72 mcg.

LINZESS is not a laxative; it is the first medicine approved by the FDA in a class called GC-C agonists. LINZESS contains a peptide called linaclotide that activates the GC-C receptor in the intestine. Activation of GC-C is thought to result in increased intestinal fluid secretion and accelerated transit and a decrease in the activity of pain-sensing nerves in the intestine. The clinical relevance of the effect on pain fibers, which is based on nonclinical studies, has not been established.

In the United States, Ironwood and AbbVie co-develop and co-commercialize LINZESS for the treatment of adults with IBS-C or CIC. In Europe, AbbVie markets linaclotide under the brand name CONSTELLA® for the treatment of adults with moderate to severe IBS-C. In Japan, Ironwood’s partner, Astellas, markets linaclotide under the brand name LINZESS for the treatment of adults with IBS-C or CIC. Ironwood also has partnered with AstraZeneca for development and commercialization of LINZESS in China, and with AbbVie for development and commercialization of linaclotide in all other territories worldwide.

LINZESS Important Safety Information

INDICATIONS AND USAGE

LINZESS® (linaclotide) is indicated for the treatment of both irritable bowel syndrome with constipation (IBS-C) and chronic idiopathic constipation (CIC) in adults and functional constipation (FC) in children and adolescents 6 to 17 years of age. It is not known if LINZESS is safe and effective in children with FC less than 6 years of age or in children with IBS-C less than 18 years of age.

IMPORTANT SAFETY INFORMATION

Contraindications

• LINZESS is contraindicated in patients less than 2 years of age due to the risk of serious dehydration.
• LINZESS is contraindicated in patients with known or suspected mechanical gastrointestinal obstruction.

Warnings and Precautions

• LINZESS is contraindicated in patients less than 2 years of age. In neonatal mice, linaclotide increased fluid secretion as a consequence of age-dependent elevated guanylate cyclase (GC-C) agonism, which was associated with increased mortality within the first 24 hours due to dehydration. There was no age dependent trend in GC-C intestinal expression in a clinical study of children 2 to less than 18 years of age; however, there are insufficient data available on GC-C intestinal expression in children less than 2 years of age to assess the risk of developing diarrhea and its potentially serious consequences in these patients.

Diarrhea

• In adults, diarrhea was the most common adverse reaction in LINZESS-treated patients in the pooled IBS-C and CIC double-blind placebo-controlled trials. The incidence of diarrhea was similar in the IBS-C and CIC populations. Severe diarrhea was reported in 2% of 145 mcg and 290 mcg LINZESS-treated patients and in <1% of 72 mcg LINZESS-treated CIC patients.
• In children and adolescents 6 to 17 years of age, diarrhea was the most common adverse reaction in 72 mcg LINZESS-treated patients in the FC double-blind placebo-controlled trial. Severe diarrhea was reported in <1% of 72 mcg LINZESS treated patients. If severe diarrhea occurs, dosing should be suspended and the patient rehydrated.

Common Adverse Reactions (incidence ≥2% and greater than placebo)

• In IBS-C or CIC adult patients: diarrhea, abdominal pain, flatulence, and abdominal distension.
• In FC pediatric patients: diarrhea.

Please see full Prescribing Information including Boxed Warning: https://www.rxabbvie.com/pdf/linzess_pi.pdf

LINZESS® and CONSTELLA® are registered trademarks of Ironwood Pharmaceuticals, Inc. Any other trademarks referred to in this press release are the property of their respective owners. All rights reserved.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Investors are cautioned not to place undue reliance on these forward-looking statements, including statements about Ironwood’s ability to execute on its mission; Ironwood’s strategy, business, financial position and operations; Ironwood’s ability to drive growth and profitability; the commercial potential of LINZESS; Ironwood’s financial performance and results, and guidance and expectations related thereto; LINZESS prescription demand growth, LINZESS U.S. net sales, total revenue and adjusted EBITDA in 2025; Ironwood’s engagement of Goldman Sachs to explore strategic alternatives; Ironwood’s concerted effort to maximize stockholder value across all areas of the business, including advancing plans for a confirmatory Phase 3 trial for apraglutide; the belief that the data from the STARS and STARS Extend trials will continue to be an integral part of an NDA submission package; the expectation that the change in AbbVie’s estimate of gross-to-net rebate reserves will impact the quarterly phasing of LINZESS U.S. net sales but not the full-year results and that moving forward, gross-to-net rebate reserves will continue to be based on rebates owed for units dispensed by channel in each applicable quarter; and the expectation that rebates owed for units dispensed in subsequent quarters will offset the Q1 2025 change in estimate impact and will not have impact for the full year . These forward-looking statements speak only as of the date of this press release, and Ironwood undertakes no obligation to update these forward-looking statements. Each forward-looking statement is subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied in such statement. Applicable risks and uncertainties include those related to the effectiveness of development and commercialization efforts by us and our partners; preclinical and clinical development, manufacturing and formulation development of linaclotide, apraglutide and our other product candidates; the risk of uncertainty relating to pricing and reimbursement policies in the U.

Contacts

Company contact:
Greg Martini

Chief Financial Officer

[email protected]

Investors:
Precision AQ (formerly Stern Investor Relations)

Stephanie Ascher

[email protected]

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